Telescopic tube and method for the manufacture thereof
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United States of America Patent
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-
Dec 25, 1984
Grant Date -
N/A
app pub date -
Feb 9, 1982
filing date -
Feb 13, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A telescopic tube, comprising a plurality of relatively sliding tube members (10, 11) fitted within each other. Along a major part (L.sub.0) of their length, the tube members are straight cylindrical tubes whose ends are provided with conical bulges (14, 15), so that one end is provided with an external cone (14) which diverges towards the end and the other end is provided with an internal cone (15) which converges towards the end. The latter end is surrounded by an external annular flange (16). The external and internal conical bulges (14) and (15) of individual tube members (10) and (11) are wedged against each other with friction engagement and keep the telescopic tube in the extended condition.
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